Visit Amazon sites : br Battery Free Wireless Optical Mouse and Pad with 2 Feet Retractable USB Cable Plus Large Printbr br Battery Free Wireless mouse the mouse pad simply plugs into your computers USB port and youre ready to go br The mouse pad uses Innovative Induction Technology to power the mouse The RFID radio frequency identification in the mouse partnering with the pad gives the mouse the means to communicate with your computer br Our large print specialty keyboard designed with yellow keys and black type - a scientifically proven combination that helps those with certain types of visual impairment br Highly visible large print letters on keycaps One-touch Internet and email hot keys br This technology avoids unnecessary pollution caused by disposing used batteries into landfills Mouse pad diameter is 886 inches giving you a 360 degree area for your mouse Vertical Scroll - Use the index fingertip to scroll the vertical scroll back and forth